Enchytraeus albidus in coconut fiber, with a core of moist cat food, in a 10oz cup.

Their favorite food is cat food, soaked in warm water until soft, but not wet.

They're best kept at 55F, are most productive at 55 – 65F, at 70F they stop reproducing, and above that they begin to die.

These lots will be in a cooler, and monitored with a remote temperature sensor.  It's best to leave them in the cooler, until you're ready to leave the auction.